考虑结构特征和荷载效应的节理岩体损伤本构模型

IF 3.6 4区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Reviews on Advanced Materials Science Pub Date : 2023-01-01 DOI:10.1515/rams-2023-0129
Bing Sun, Peng Yang, Yu Luo, Bo Deng, Sheng Zeng
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引用次数: 0

摘要

摘要地下工程中岩体的破坏通常是由岩体成因和环境应力共同造成的。研究岩石在荷载作用下强度与变形的本构关系,对于此类场景的设计和评价至关重要。本文建立了考虑节理损伤动态变化的损伤本构模型来描述岩石在荷载作用下的损伤行为。首先,综合考虑节理岩体结构特征的影响,将Drucker-Prager准则与Hoek-Brown准则相结合;其次,基于宏微观耦合的思想,推导了损伤变量的计算公式;最后,建立了节理岩体的损伤本构模型,并与试验数据进行了拟合和对比。结果表明:损伤值和峰值强度的变化规律相反,应力应变对模型参数s的变化高度敏感;该模型能较准确地描述节理劣化对岩体压缩破坏全过程的影响,表明该损伤本构模型在工程实践中对评价节理岩体强度特性具有实用价值。
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Damage constitutive model of jointed rock mass considering structural features and load effect
Abstract Rock masses in underground engineering are usually damaged, which are caused by rock genesis and environmental stress. Studying the constitutive relationship between rock strength and deformation under loading is crucial for the design and evaluation of such scenarios. The new damage constitutive model considering the dynamic change of joint damage was developed to describe the behavior of rocks under loading in this work. First, considering the influence of jointed rock mass structural features in their entirety, the Drucker–Prager criterion and the Hoek–Brown criterion were combined. Second, based on the idea of macro–micro coupling, the calculation formulae of damage variables were derived. Finally, the damage constitutive model of the jointed rock mass was established, and the proposed model was fitted and compared with the test data. Results show that the variation rules for damage value and peak strength are opposite, and the stress–strain is highly sensitive to changes in the parameter s of the model. Moreover, the proposed model can accurately describe the effect of joint deterioration on the entire process of rock mass compression failure, which shows that the damage constitutive models are useful for evaluating the strength characteristics of jointed rock mass in engineering practice.
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来源期刊
Reviews on Advanced Materials Science
Reviews on Advanced Materials Science 工程技术-材料科学:综合
CiteScore
5.10
自引率
11.10%
发文量
43
审稿时长
3.5 months
期刊介绍: Reviews on Advanced Materials Science is a fully peer-reviewed, open access, electronic journal that publishes significant, original and relevant works in the area of theoretical and experimental studies of advanced materials. The journal provides the readers with free, instant, and permanent access to all content worldwide; and the authors with extensive promotion of published articles, long-time preservation, language-correction services, no space constraints and immediate publication. Reviews on Advanced Materials Science is listed inter alia by Clarivate Analytics (formerly Thomson Reuters) - Current Contents/Physical, Chemical, and Earth Sciences (CC/PC&ES), JCR and SCIE. Our standard policy requires each paper to be reviewed by at least two Referees and the peer-review process is single-blind.
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